Driving mechanism for pumps.



No. 753,771. PATENTED MAR. 1, 1904.

J. G. WHITMER. DRIVING MECHANISM FOR PUMPS.

APPLICATION FILED SEPT. 15. 1903.

N0 MODEL.

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Patented March 1, 1904.

PATENT OFFICE.

JOHN C. VVHITMER, OF LORDSBURG, CALIFORNIA.

-DRIVING MECHANISM FOR PUMPS.

SPECIFICATION formingpart of Letters Patent N0. 753,771, dated March 1,1904. 7

Application filed September 15, 1903. Serial No. 178,326. (No model.)

To alZ whom it may concern:

Be it known that I, JOHN C. WHITMER, a citizen of the United States,residing at Lordsburg, in the county of Los Angeles, State ofCalifornia, have invented new and useful Improvements in DrivingMechanism for Pumps, of which the following is a specification.

My invention relates to driving mechanism for a double-acting pump; andthe object thereof is to provide means for operating the same to producea continuous flow of water with a minimum expenditure of power. Iaccomplish this object by the mechanism described herein, andillustrated in the accompanying drawings, in which Figure 1 is a sideelevation of my driving mechanism, and Fig. 2 is a. plan of the same.

In the drawings, A is the frame, on which are pivotally mounted theslotted levers B, which carry on their short end the toothedsectors C,which mesh with rack-bars D, to which the pump-rods (not shown) areconnected. In the frame is mounted the driving-shaft E, on one end ofwhich is pulley F for the reception of a belt, (not shown,) by means ofwhich power is applied to the driving-shaft. Any other -means ofapplyingpower may be adopted.

On the driving-shaft are rigidly mounted pinions G, which mesh with gearwheels H, which are mounted in'bearings secured to the frame. I haveshown these gear-wheels mounted on shafts I, which have two bearings Jsecured to the frame; but only one bearingis necessary. Thesegear-wheels are pro.- vided with crank-pins K, which carry slideblocksL, that move in slots B of the slotted levers. These crank-pins arearranged on opposite sides of the shafts on which the gears power isapplied to drive the levers the strain of lifting the rack-barscommences and is completed during the time that the slide-block is goingoutwardly or away from the fulcrum and back from the point at which thecrankpin reaches a line which runs tangent from the fulcrum to thepathof revolution of the crankpin. The downward movement is effectedduring the remainder of the revolution of the crank-pin. As the downwardmovement of the rack-bar is accomplished in less time than the upwardmovement at every stroke for a short period of time, both rackbars moveupward together, thereby always insuring a constant motion in the upwardflow of the water. At the back of the rack-bars are placedroller-bearings M to reduce the frictional contact of the rack-bars intheir movement through the guide N, fixed to the frame. 1

It will be observed that when the crank-pin is at and very close to thepoint at which a line projected from the fulcrum is tangent to its lineof revolution the rack-bar has but very slight if any movement, 7 whichgives the valves of the pump ample time to seat themselves before theupward stroke commences,

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In a driving mechanism, a frame; two levers pivoted intermediatetheir ends in said frame; each of said levers having at one end atoothed sector, and a longitudinal slot in the other end; rack-barsmeshing with said sectors and adapted to be moved thereby; gears mountedin said frame at a point crossed by the oscillation of the slotted endof said levers; crank-pins affixed to said gears at points on theopposite sides of the shafts on which the gears are mounted, saidcrank-pins passing into the slots in said levers; means to operate saidgears.

2. In a pumping mechanism a frame; two levers pivotally mounted in saidframe intermediate their ends so that the distance from the pivot to oneend shall be greater, than the distance to the other end, said leversbeing in parallel planes and each having on the shorter end a.tooth-sector and in the longer end a lonpoint crossed by the center ofthe slots as the levers move in said frame; slide-blocks in said slots;crank-pins aflixed to said gears at points I on the opposite sides ofthe axles on which the gears are mounted, said crank-pins beingoperatively connected to said slide blocks;

means to operate said gears.

In witness that I claim the foregoing I have hereunto subscribed my namethis 8th day of 5 September, 1903.

. JOHN C. WHITMER. Witnesses:

L. C.- MEREDITH, W. S. CARSON.

